"Draft for public comment. Comment period ends: October 31, 2001"--Cover. "July 2001." Chemical manager(s)/author(s): Malcolm Williams ... [et al.]--P. xi. "This toxicological profile is prepared in accordance with guidelines developed by the Agency for Toxic Substances and Disease Registry (ATSDR) and the Environmental Protection Agency (EPA). The original guidelines were published in the Federal Register on April 17, 1987"--P. v. Includes bibliographical references (p. 179-223).